RtI/MTSS (Response to Intervention/Multi-Tier System of Supports) is a problem-solving approach that includes a process of remedial interventions that generate data to guide instruction and identify students with learning disabilities that may require special education and related services. According to a 2004 LD Roundtable, "data from an RTI process should include the following:

1. High quality, research-based instruction and behavioral supports in general education.

6. Documentation that the timelines described in the federal regulations §300.532-300.533 are adhered to unless extended by mutual written agreement of the child's parents and a team of qualified professionals as described in §300.540.

7. Systematic assessment and documentation that the interventions used were implemented with fidelity."

This section includes resources to further the understanding of RtI/MTSS and approaches to implementation within schools.